#include <stdio.h>
void fun2(char a, char b)
{
	printf(" %c%c", a, b);
}
char a = 'A', b = 'B';
void fun1()
{
	char b; a = 'C'; b='D';
}
int main(void)
{
	fun1();
	printf("%c%c", a, b);
	fun2('E', 'F');
	return 0;
}